Do you need a hard drive for xbox live?

Do you need a hard drive for xbox live or will it work with just a memory card. All I want to do is play UT3 when it comes out so storage isn't an issue. Also will my xbox live account be tied to my memory card/ hard drive or to my gamer tag. Thanks in advance :-)

you only need a memory card to play livejano84

lol, WRONG......Please Jano84; only give advice if you actually know what your talking about....kthxbai

shut up a memory card is what you really need because all you want to do is play xbox live and by the way can you use a 2 gb usb driveloayrules